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# CORE 2 (C2) A- Level Maths Formulas Watch

1. These are the all formulas needed for C2 that aren't listed on the formula sheet

Sin Rule
a/sinA = b/sinB

Area of a triangle
1/2absinC

Area of a sector
θr²/2

tanx=sinx/cosx

Area of a circle
πr²

sin²θ + cos²θ = 1

Arc length
θr

Circumference of a circle
2πr
2. @_mou

I've moved this to the maths forum
3. (Original post by _mou)
These are the all formulas needed for C2 that aren't listed on the formula sheet

Sin Rule
a/sinA = b/sinB

Area of a triangle
1/2absinC

Area of a sector
θr²/2

tanx=sinx/cosx

Area of a circle
πr²

sin²θ + cos²θ = 1

Arc length
θr

Circumference of a circle
2πr

I've moved this to the maths forum

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